Brake shoe and beam attachment



(NoModeL) S. A. BEMIS.

BRAKE SHOE AND BEAM ATTACHMENT. No. 429,674. Patented June 10, 1890.

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SUMNER A. BEMIS, OF SPRINGFIELD, MASSACHUSETTS.

BRAKE SHOE AND BEAM ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 429,674, dated June 10,1890.

Application filed February 10, 1890. Serial No. 339,927. (No model.)

To all whom it may concern.-

Be it known that I, SUMNERA. BEMIS, acitizen of the United States,residing at Springfield, in the county of Hampden and State ofMassachusetts, have invented new and useful Improvements in Brake-Shoeand Brake Beam Attachments, of which the followingis a specification.

This invention relates to car-brakes, and pertains to improved means forattaching brake-shoes to brake-beams, all as hereinafter fullydescribed, and pointed out in the claims.

In the drawings forming part of this specification, Figure 1 is a viewof a brake-shoe having brake-beam attachments embodying -myimprovements, this figure showing a brake-beam in crosssection connectedto said shoe. Fig. 2 is a transverse section of the brake shoe and beamattachments on the line 2 2, Fig. 1, this figure showing in plan viewaportion of the brake-beam connected to said shoe. Fig. 3 is aperspective View of the brake-shoe, the brake-beam-locking parts, and ofa portion of a brake-beam. Fig. 4 illustrates a modification hereinafterdescribed.

In the drawings, A indicates a brake-shoe, made, preferably, of iron bycasting in the usual way. The shoe A is provided on its outer side witha bifurcated bracket B, having a horizontal slot between its arms 2 and3, to receive therebetween the brake-beam 4, in the position indicatedin Figs. 1 and 2. The inner opposite walls of said bracket-arms 2 and 3are grooved or recessed, as clearly shown in Fig. 3, to receive the endsof a saddle-clamp 5, the arms a a of which are adapted to enter the saidgrooves c c in the said opposite walls of the bracket B, the thicknessof said saddle-arms a being in practice equal to the depth of saidgrooves c c, and the opening between said saddle-arms being about equalto the thickness of the brake-beam so that the said clamping-saddle mayfreely inclose said beam, as shown in Fig. 1. iVhen the clamping-saddle5 is placed in the grooves c c of the bracket B, the inner oppositewalls of said saddle-arms are in substantially the same plane as are theadjoining portions 50 of the inner opposite walls of the arms of thebracket B, so that when the brake-beam 4 is in locked position in saidbracket, as shown in Fig. 1, it has a bearing by its opposite sides bothagainst the inner opposite walls of said saddle-clamp and the saidportions of the inner opposite walls of the bracket B.

A key-socket dis formed vertically through the rear end of the bracket Bat or near its junction with the brake-shoe, to receive the locking-key6, and corresponding openings 6 are made near the extremities of thesaddlearms a, which openings 6 so nearly register with the said keysockets or openings d through the bracket B that the key 6 will passthrough the said openings dand e when the saddle is placed in thebracket, and, ow ing to the tapering or wedge shape of said key, willserve to rigidly lock the saddle within the bracket, together with thatpart of the brake-beam 4 embraced by said saddle,

as shown in Figs. 1 and 2.

Fig. 1 shows the brake-shoe and bracket, the clamping-saddle, and thelocking-key, all in the positions they occupy when the brakeshoe andbrake-beam are locked together, said locking being effected by drivingthe tapering key 6 through the bracket and the arms of the saddle,thereby drawing the latter firmly against the outer edge of thebrakebeam and drawing the saddle and the beam forcibly inward in saidbracket. The said means for locking the brake-shoe and brakebeamtogether provide for a rigid attachment of said parts to each other,whereby vibratory motion is avoided and conseqent wear and noise areobviated, and the brake-shoe is made adjustable.longitudinally on thebrake-beam to provide for varying gages of track and wheels.

The circular openings 0 through the arms a of the saddle-clamp arebrought partially Within the semicircular recesses 'v in the ends of thearms of the bracket B, as indicated by dotted lines in Fig. 2, when thesaddle-clamp is locked in said bracket, and said openings 0 areprovided, so that by driving a tapering pin through said openings, whichshall at the same time engage with the end of the bracket-arms, thesaddle-clamp may be forced out of the bracket-arms in order to detachthe brakebeam from the brake-shoe after the lockingkey shall have beenremoved. If desired, the bracket on the brake-shoe may be made,

as shown in Fig. i, with plain inneropposite walls, and adapted toreceive the brake-beam therebet-ween Without the interposition of theclamping-saddle, the beam being locked to thebraeket by the same key 6passing through suitable perforations in the bracket-armsand aperforation in the beam; but this modilied connection is less rigidanddurable than that shown in the other figures of the drawings.

hat I claim as my invention is 1. Means for locking a brake-shoe to abrake-beam, consisting of a bifurcated bracket on said shoe receivingsaid beam, a clamp, substantially as described, inclosing said beam andextending into said bracket, and a looking-key passing through saidbracket and SUMNER A. BEMIS.

Witnesses:

WM. BELLoWs, II. A. CHAPIN.

